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a fost răspuns

calculeaza:
3m+20cm=___cm;
7m+400cm=___m;
3m+2000mm=___mm;
5000m+7km=___km;
980hm+78000m=___km;
8m-2450mm=___cm;
70km-45000m=___m;
500cm-2m=___cm;
8m-155cm=___cm;
900cm-370mm=___mm;
8×35hm=___km;
900mm÷5=___cm.
va rog din suflet să mă ajutati!​

Răspuns :

Alexa2708

1)3m+20cm=

300+20=320cm

2)7m+400=cm

7m+4=11m

3)3m+2000mm=mm

300+2000mm=5000mm

4)5000m+7km=km

5km+7km=12km

5)980hm+78000m=km

98km+78km=176km

6)8m-2450mm=cm

800-245=555cm

7)70km-45000m=25000m

70000-45000=25000m

8)500cm-2m=cm

500-200=300cm

9)8m-15cm=cm

800cm-155cm=645cm

10)900cm-370mm=mm

9000-370=8630mm

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